Locking device for independent rotation motors



L. c. BNAYLES ET AL LOCKING DEVICE FOR INDEPENDENT ROTATION MOTORS Filed No v. 29. 1921 bL T THE"? AndR EY Fatented that, 3i), M23

LEWIS C. BAYLES AND lvi'. SLATER, EASTON, PENNSYLVANIA, ASSIGNORS TO INGERSOLL-RAND COMPANY, OF CITY, NEVJ JERSEY, A CORPORATION OF NEW JERSEY.

LOCKING DEVICE FOR INDEPENDENT -ROTATON MOTORS.

Application filed November 25 1921.

To all whom 2'25 may concern:

Be it known that we, Lnwis BAYLES and Fnnn M. SLATER, citizens of the United States, residents of Easton, county of Northa'npton, and State of Pennsylvania, have invented a certain Locking-Device for Independent Rotation Motors, of which the following is a specification, accompanied by drawings. 1

This invention relates to fiuid actuated rock drills of the hammer type, having an independent motor for rotating the drill steel, but relates more particularly to a device for holding the motor against reverse rotation when desired.

The objects of the invention are to enable the rotation motor to be cut out "by mechanical means, and enable the machine to be slowly ratcheted on starting on a bad surface and also to enable the operator to lock the gears of a gear drive and hold the motor against reverse rotation," when the drill steel sticks, so that he can ratchet the steel loose again, in which case the motor will automatically .pick up its rotation and continue to rotate the steel.

In a stope drill, for instance, having a fluid actuated rotation motor of the gear type for rotating the drill steel, the motor is ordinarily mounted on the drill cylinder, or some portion of the'ma'chine connected to the drill cylinder, and in the type of machine to which this invention is applied for purposes of illustration, the entire drill casing including the cylinder and rotation handle connected to the cylinder, tends to rotate in the opposite direction to the motor and the drill steel, or away'iroin the operator, if the machine is drilling an up hole,

so that the operator must hold the handle.

If the drillsteel sticks, the'handle would be pulled around, away from the operator, and in accordance with our invention, we have devised means for enabling the operator to throw in the locking device by pullling the rotation handle towards him which rotates the drill cylinder in a direction opposite to the angular direction of the thrust of the motor on the drill cylinder. The operator may then ratchet the machine back and forth until the drill steel is sufliciently loosened to enable the motor "to automatically resnme therotation. Further objects of the invention will here- Serial No. 518,639.

inafter appear, and to all of these ends the invention consists of the features of construction and combinations of elements hereinatterfully described andclaimed in this specification, and shown in one of its preferred forms in the accompanying drawings,

in which- Figure is a side elevation partly in longitudinal section of so much oi the percussive and rotative elements of a stope drill as will serve to illustrate the invention.

Figure 2 is a detail transverse sectional View oi": the machine partly broken away, taken on the line 22 of Figural, with the iocking device in unlocked position,

l igure 3 is a view similar to Figure 2 with the locking device in locked position,

Figure 4k is a detail perspective view of the locking pawl, and

Figure 5 is a detail perspective view of the pawl spring.

Referring to the drawings, the machine comprises the cylinder A, having the front head B provided with the rotating chuck G into which the shank of the drill steel D extends in position to receive the blows of impact of the fluid actuated reciprocating piston hammer E. Suitable ports and passages may be providedfor the distribution or" motive fluid for actuating the hammer, but these are not shown, as they form no part of the present invention.

A motor casing F is mounted at the back end of the cylinder and closed by the back head G and a portion of an air feed cylinder H is shown connected to the back head G. The parts of the casing so far described are held together by the usual side bolts J.

The fluid actuated rotation motor comprises the gears K and L in the motor casing F, the gear L being operatively connected by a train of gearing for rotating the drill steel. In this instance, a pinion O meshes with a gear P'on the counter shaft which is DI'OVlClGfi with a pinion R meshing with the gear S on the chuck G. M0- tive fluid may be supplied to and exhausted from the rotation motor in any suitable manner (not shown).

In a rotation apparatus of the type described, the drill steel D will be rotated in the same direction as the motor gear L, to which the train of gearing is connected, and

V in this instance, let it'be assumed that the motor gear L is rotating counter-clockwise, as Figure 1 1s viewedupward, 1n whlch case the drill steel D will also'be rotated counterclockwise as indicated by the arrow T on the gear Set the chuck C in Figure 2. 1 The thrust o-f'the vrotation motor on the motor 7 casing and drill cylinder will be in a direction opposite to the angular direction of the rotation of the driving gear L so that Figure 1 is viewechthe rotation handle U tomary.

'chanical means for holding connected to the motor casing and movable withthe drill cylinder will be rotated clockwise or away from the operator, unless the handle U is held by the operator as is cur- Unless some for the gear motor, the operator cannot ratchet his machine back and forth, by

means of the handle U for any purposes,

and in accordance with our invention, me he motor against, reverse rotation. are provided, op-

eratively controlled by the manipulation of the handle U. In this instance, a Senncircular. pawl V, having a bevelled end .W,

head Y of the rivet X passes, lies between I the pawl V in the wall of the front head B -and maintains the pawl in frictional con- .f' desires to ratchet the machine on starting on a slanting surlace for instance.

tact with the teet-h'of the pinion R. The interior of the pawl V is preferably pro-' vided with serrations or shallow teeth 0 for producing greater frictional engagement between the teeth of the pinion R and the inside ofthe pawl than between the spring a and the wall of the front head in. order that the pawl may be positively carried into engagement with the teeth of the gear S when the pinion R is rotated in the opposite di- .rection to that indicated in Figure 2, "indicated in Figure- 3. In the operation of r the device, let it be assumed iii-the first place, that the operator grasping the rotation handle U and pulling it towardshim, as Figure 1 is viewed, and,

' thus rotating the entire drill casing and the .pinion R counterclockwise, the frictional en- :pawl V will carry the bevelled end W of V the pawl into engagement with two teeth of.

the chuck gear S. By :moving the handle 7 back and forththe bevelled and? of thev pawl will slide in one direction over the locking device is provided ftends to vrotatethe drill steel. gagement between the pinion R and the teeth of the chuck gear 8 and then engag'ge the teeth again in the other direction, so

that the operatonmay. ratchet his machine,

until he desires to applied.

have "motor. rotation After the machine hasbeens-running, i i

the drill steel sticks,thus stopping 't-he'rota- Y tion of the chuck, zhe operator may pull the handle U towards him,' throw the ratchet WV to the position indicated Fig ure' 3, and, then ratchet his machine until the rotation to beresumed.

" We claim: v r 1 1. In a fluid. actuated rock drill of the hammer type, the combination with the cylinder and reciprocating"piston, of an in-.

dependent fluid actuatedi'otationmotor. for

the'drill steel,',andiinechanical means for holding the motor against reverse rotation connected. to beoperatedxby rotative movement of the drill cylinder opposite to the angular direction of thrust of the motor on the; machine.

2. In a andwas met (mu 'oi the hammer type, the combination with the the steel is loosenedsufiiciently to permit 7 cylinder andr'eciprocating, piston of an 'independent fluid actuated rotation motor for the drill steelfmounted on the drillicylinder, and mechanical means for holdinglthe motor against reverse rotationconnected to be operated by rotativemovement of the.

drill cylinderoppositetofthe angular "three 7 tion of thrust of cylinder.

.3. In a.

the motor 7 on the drill the drillsteel, mounted on the drill cylin-.

der, mechanical means ior'holding themotor fluidactuated rock drill the V. hammer type, V the combinationwith the against. reverse rotation connected to :be

operated by rotative movement of 'the drill cylinder opposite to the angular direction of 1' thrust ofthe motor on the drill cylinder, and

saidopposite direction to. the angular thrust V of the motor independently of the motor. 4. In a fiuidactuated jrock drill of the w 7 11a hammer type,- the, combination withgthe cylinder and'recipro'eating piston, of an inf dependentfiuid actuatedjrotation motor for the drillsteel, mounted ontheldrill cylinder, i and mechanical .means .for holding the motor against reverse rotation-connected.to'

be operated rotative movement of the drill cylinder "in the. direction the motor 5. In a fluid actuated rock drill of the hammer type, the,v combination with the cylinder andreciprocating piston, of an in no airotation handle connectedto .thedrill r cylinder capable of rotating'thecylinder in V against reverse rotation connected to be operated by rotative movement of the drill cylinder in the direction the motor tends to rotate the drill steel, and a rotation handle conected to the drill cylinder capable of rotating the-cylinder in said direction of rotation 01: the motor independently of the motor.

6. In a fluid actuated rock drill or" the hammer type, the combination with the cylinder and reciprocating piston, of a rotating chuck, an independent fluid actuated rotation motor geared to said chuck, and a pawl adapted to engage one of said gears for holding said gear against reverse rotation.

7 In a fluid actuated rock drill of the hammer type, the combination with the cylinder and reciprocating piston, of a 'otating chuck, an independent fluid actuated rotation motor geared to said chuck, and a pawl partially surrounding and carried on one of the gears adapted to engage another of said gears for preventing the reverse rotation of said gears.

8. In a fluid actuated rock drill of the hammer type, the combination with the cylinder and reciprocating piston, of a rotating chuck, an independent fluid actuated rotation motor mounted on the drill cylinder and geared to said chuck, and a pawl for preventing the reverse rotation of the chuck relative to the cylinder, said pawl being adapted to be thrown into engagement with one of said gears by rotative movement of the drill cylinder opposite to the angular direction of thrust of the motor on the drill cylinder.

9. In a fluid actuated rock drill of the hammer type, the combination with the cylinder and reciprocating piston, of a rotating chuck, an independent fluid actuated rotation motor mounted on the drill cylinder and geared to said chuck, and a pawl for preventing the reverse rotation of the chuck relative to the cylinder, said pawl being adapted to be thrown into engagement with one of said gears by rotative movement of the drill cylinder opposite to the angular direction of thrust of the motor on the drill cylinder, and'a rotation handle connected to the drill cylinder for rotating the cylinder in said opposite direction to the angular thrust of the motor independently of the motor.

In testimony whereof we have signed this specification.

LEWIS C. BAYLES. FRED M. SLATER. 

